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use strict;
use warnings;
use YAPE::Regex::Explain;
...
my $regex2 = qr{Hello\#\ World}x;
my $parser2 = YAPE::Regex::Explain->new($regex2)->explain;
print "$parser2\n";

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The regular expression:
(?x-ims:Hello\#\ World\\E)
matches as follows:
...
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)                        end of grouping
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